Everything You Need To Know....
07 Feb,2024
Dr. Saket Kant in Endocrinology & Diabetes - Max Healthcare
What is Diabetes Nephropathy?
Kidneys are composed of over a million nephrons, which are pivotal in
filtering blood and also play a crucial role in regulating the body's
fluid and electrolyte balance. Diabetes-related nephropathy, also known
as diabetic kidney disease (DKD), is a condition that impairs kidney
function, hampering the kidneys’ ability to filter waste from the body,
including nitrogenous waste products such as urea, muscle waste such as
creatinine, and other toxins.
Kidney nephrons have clusters of tiny blood vessels known as
glomeruli, which initiate the blood-filtering process. These glomeruli
have semi-permeable membranes that allow water and soluble wastes to
pass through, ultimately being excreted as urine. In individuals with
diabetes, the body is unable to effectively process blood sugar
(glucose) from food and drink. This excess glucose in the bloodstream
can harm the glomerular membranes and other parts of the nephron.
When the glomeruli are damaged, they lose their ability to filter
fluids efficiently. As a result, toxins that should be expelled in urine
accumulate in the blood and body, leading to further health
complications.
Stages of Diabetes Nephropathy
The progression of diabetes nephropathy can be categorised into distinct stages based on the estimated glomerular filtration rate
(eGFR), which measures the efficiency of kidney filtration. A normal
eGFR is around 100, while an eGFR of 0 indicates complete loss of kidney
function.
The stages of kidney disease, including diabetes-related nephropathy, are as follows:
Stage I: At this stage, the eGFR is 90 or higher, indicating mild kidney damage but normal function.Stage II: The eGFR ranges from 60 to 89, signifying more kidney damage than in Stage I, but the kidneys still function adequately.Stage III: The eGFR falls between 30 and 59, reflecting either mild or severe reduction in kidney function.Stage IV: In this stage, the eGFR is between 15 and 29, indicating severe loss of kidney function.Stage V: This final stage is characterised by an eGFR below 15, where the kidneys are either nearing or have reached complete failure.
Symptoms of Diabetes Nephropathy
The symptoms of diabetic nephropathy, also known as diabetic kidney
disease, can vary and may not be noticeable in the early stages.
However, as the condition progresses, several signs and symptoms may
emerge, including:
Swelling (Oedema): Fluid retention can lead to swelling in the legs, ankles, feet, and sometimes the hands and face.Fatigue: Reduced kidney function can cause a build-up of
toxins and impurities in the blood, leading to feelings of tiredness and
weakness.Urination Changes: This can include an increase or decrease
in frequency, especially at night (nocturia), or the appearance of foam
or bubbles in the urine due to excess protein (proteinuria).Nausea and Vomiting: As waste accumulates in the blood, it can cause nausea or vomiting.Shortness of Breath: Fluid build-up in the lungs can lead to difficulty breathing.Itching (Pruritus): Waste build-up in the body can also cause severe itching.Loss of Appetite: Due to the accumulation of toxins, individuals may experience a decreased appetite.Muscle Cramps: Electrolyte imbalances caused by impaired kidney function can lead to muscle cramping.High Blood Pressure: Impaired kidney function can result in increased blood pressure.Blood in the Urine (Hematuria): In some cases, the urine may become tinged with blood.
Causes of Diabetes Nephropathy
Diabetic kidney disease is a frequent complication associated with both type 1 and type 2 diabetes.
If diabetes is not adequately managed over an extended period, it can
harm the blood vessels in the kidneys responsible for filtering waste
from the bloodstream. This damage can result in kidney impairment and
lead to elevated blood pressure. Furthermore, high blood pressure can
exacerbate kidney damage by increasing pressure within the kidney's
filtration system.
Risk factors of Diabetes Nephropathy
Individuals with diabetes face an increased risk of developing diabetic nephropathy due to several factors:
Hyperglycemia: Poorly controlled high blood sugar levels can significantly raise the risk.Hypertension: Unmanaged high blood pressure also contributes to the development of this condition.Smoking: Tobacco use exacerbates the risk of diabetic nephropathy.High Cholesterol: Elevated blood cholesterol levels are another contributing factor.Obesity: Excess body weight increases the likelihood of developing diabetic nephropathy.Family History: A history of diabetes and kidney disease in the family can heighten the risk.
Diabetes Nephropathy Diagnosis
Individuals with diabetes are often subject to annual blood and urine
examinations by their healthcare providers to detect early indicators
of kidney damage. Commonly conducted tests include:
Microalbuminuria Urine Test
This test searches for albumin in the urine. Typically, urine doesn't
contain albumin, so its presence indicates potential kidney damage.
BUN Blood Test
The BUN (Blood Urea Nitrogen) test measures the amount of urea
nitrogen in the blood, a byproduct of protein breakdown. Elevated urea
nitrogen levels may suggest kidney failure.
Serum Creatinine Blood Test
This test determines the level of creatinine in the blood. Creatinine
is a waste product that the kidneys normally eliminate. High blood
creatinine levels can indicate impaired kidney function. The results are
also used to calculate the estimated glomerular filtration rate (eGFR),
providing an assessment of kidney performance.
Kidney Biopsy
If there's a suspicion of diabetic nephropathy, a kidney biopsy might be performed. This surgical procedure involves removing a small kidney tissue sample for microscopic examination.
Diabetes Nephropathy Treatment
The primary approach to managing diabetic nephropathy involves addressing and controlling diabetes
and hypertension. This comprehensive treatment strategy encompasses
dietary modifications, lifestyle changes, exercise, and prescribed
medications. Effective control of blood sugar and blood pressure can
help prevent or slow the progression of kidney complications and other
related health issues.
Regarding medications, in the initial stages of diabetic nephropathy, treatment may include:
Blood Pressure Management: Medications such as
angiotensin-converting enzyme (ACE) inhibitors and angiotensin-2
receptor blockers (ARBs) are commonly prescribed to manage high blood
pressure.Blood Sugar Control: Various medications are used to maintain
blood sugar levels. These range from traditional options like insulin
to newer medications such as metformin, glucagon-like peptide-1 (GLP-1)
receptor agonists, and SGLT2 inhibitors. Healthcare professionals often
recommend discussing the suitability of treatments like SGLT2 inhibitors
or GLP-1 receptor agonists, as these can offer additional protection to
the heart and kidneys from diabetes-induced damage.High Cholesterol Treatment: Statins, a type of
cholesterol-lowering drug, are employed to reduce cholesterol levels and
diminish protein presence in the urine.Kidney Scarring Reduction: Finerenone (Kerendia) has been
found to potentially alleviate tissue scarring in diabetic nephropathy.
Studies indicate that this medication might decrease the risk of kidney
failure and reduce the likelihood of heart disease-related mortality, heart attacks, and hospitalisations for heart failure in adults with chronic kidney disease linked to type 2 diabetes.
Treatment for Advanced Diabetic Nephropathy
In cases of kidney failure, also known as end-stage kidney disease,
treatment is geared towards either substituting kidney functions or
providing comfort. Available options for diabetic kidney disease
include:
Kidney Dialysis:
This procedure is employed to eliminate waste products and excess fluid
from the blood. Hemodialysis, which filters blood using a machine
outside the body, is one form of dialysis. This may require visits to a
dialysis centre approximately three times a week, or it can be
administered at home by a trained caregiver. Each session typically
lasts between 3 and 5 hours.Peritoneal Dialysis:
This technique utilises the abdomen's inner lining, the peritoneum, as a
filtration medium. A cleansing fluid is circulated through a tube into
the peritoneum. It can be performed at home or even at work, although it
may not be suitable for everyone.Transplantation: For some, a kidney transplant or a kidney-pancreas transplant is the most effective treatment for kidney failure. If a transplant is considered, the patient undergoes an evaluation to determine their eligibility for the surgery.Symptom Management: In instances where a patient with kidney
failure opts against dialysis or a transplant, life expectancy may be
limited to only a few months. In such cases, treatment focuses on
ensuring comfort.
Diabetes Nephropathy Complications
Complications arising from diabetic nephropathy often develop
gradually over several months or years. These complications may
encompass:
Accumulation of Body Fluids: This can result in swelling in the arms and legs, elevated blood pressure, or fluid accumulation in the lungs, known as pulmonary oedema.Elevated Potassium Levels: Increased potassium in the blood, a condition known as hyperkalemia, is another potential complication.Cardiovascular Disease: Diabetic nephropathy can lead to heart and blood vessel diseases, increasing the risk of stroke.Anaemia: A reduction in red blood cells, responsible for transporting oxygen, is also a common issue, referred to as anaemia.Pregnancy Complications: The condition can lead to
complications during pregnancy, posing risks to both the pregnant
individual and the developing foetus.
Diabetes Nephropathy Prevention
To minimise the risk of developing diabetic nephropathy, one should:
Regularly Visit Healthcare Providers: It's crucial to
maintain regular appointments with healthcare teams to manage diabetes
effectively. These check-ups, which may be annual or more frequent, are
essential for monitoring diabetes management and detecting diabetic
nephropathy and other complications.Effectively Treating Diabetes: Proper diabetes management
is key. By keeping blood sugar levels within the target range as
consistently as possible, one can potentially prevent or slow the
progression of diabetic nephropathy.Control High Blood Pressure and Other Conditions: If high
blood pressure or other risk factors for kidney disease are present,
collaborating with nephrologists to manage these conditions is
important.Use Over-the-counter Medications Cautiously: When taking
over-the-counter pain relievers, such as aspirin, naproxen sodium
(Aleve), and ibuprofen (Advil, Motrin IB, and others), it's important to
follow directions and read labels carefully. These medications can
cause kidney damage or kidney failure in individuals with diabetic
nephropathy.Maintain a Healthy Weight: Staying physically active most
days of the week can help in maintaining a healthy weight. If weight
loss is necessary, it's advisable to consult with nephrologists for the most effective approach.
Conclusion
Diabetic nephropathy is a significant risk for individuals with
diabetes, marked by stages and symptoms that require vigilant
management. For personalised care and expert guidance on prevention and
treatment, visit Max Healthcare. Our dedicated team is committed to providing comprehensive support and advanced solutions for your kidney health. Book your appointment today and take a proactive step towards managing diabetic nephropathy with Max Healthcare.